先期震动对土石坝地震永久变形的影响研究
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摘要
针对经历了"5.12"汶川大地震的紫坪铺面板堆石坝工程,进行了坝料的大型动三轴试验,研究了先期振动对坝料残余应变的影响。在此基础上,采用基于3维非线性动力反应的地震永久变形计算方法,进行了紫坪铺面板坝地震永久变形的计算,重点分析了先期震动对坝体地震永久变形的影响。结果表明,如果考虑先期已遭受强震作用影响,大坝的地震残余变形明显减小。
Aiming at the Zipingpu concrete-face fill rock dam(CFRD) which had suffered "5.12" Wenchuan Earthquake,the effect of pre-vibration on the residual strains of rockfill are studied by the large-scale dynamical triaxial test.Based on the test results,the earthquake-induced permanent deformations of Zipingpu CFRD are evaluated by adopting the developed evaluation method of 3-D nonlinear earthquake-induced permanent deformations,its focuses are the effect of pre-vibration on the earthquake-induced permanent deformation.If the effect of pre-vibration is considered,the earthquake-induced permanent deformation of CFRD is reduced greatly.
Aiming at the Zipingpu concrete-face fill rock dam(CFRD) which had suffered "5.12" Wenchuan Earthquake,the effect of pre-vibration on the residual strains of rockfill are studied by the large-scale dynamical triaxial test.Based on the test results,the earthquake-induced permanent deformations of Zipingpu CFRD are evaluated by adopting the developed evaluation method of 3-D nonlinear earthquake-induced permanent deformations,its focuses are the effect of pre-vibration on the earthquake-induced permanent deformation.If the effect of pre-vibration is considered,the earthquake-induced permanent deformation of CFRD is reduced greatly.
引文
[1]汪闻韶,金崇磐,王克成.土石坝的抗震计算和模型试验及原型观测[J].水利学报,1987,18(12):1-15.WANG Wenshao,JIN Chongpan,WANG Kecheng.Aseismatic calculation,model test and prototype experiments and field monitoring of earth-rockdam[J].Journal of Hydraulic Engineering,1987,18(12):1-15.
[2]陈生水,霍家平,章为民.“5.12”汶川地震对紫坪铺混凝土面板堆石坝的影响及原因分析[J].岩土工程学报,2008,30(6):795-801.CHEN Shengshui,HUO Jiaping,ZHANG Weimin.Analysis of effect of“5.12”Wenchuan Earthquake on Zipingpu CFRD[J].Chinese Journal ofGeotechnical Engineering,2008,30(6):795-801.
[3]赵剑明,刘小生,温彦锋,等,紫坪铺大坝汶川地震震害分析及高土石坝抗震减灾研究设想[J].水力发电,2009,35(5):11-14.ZHAO Jianming,LIU Xiaosheng,WEN Yanfeng,et al.Earthquake damages of Zipingpu CFRD in Wenchuan Earthquake and study proposal onseismic fortification of high rock-fill dam[J].Water Power,2009,35(5):11-14.
[4]赵剑明,汪闻韶,常亚屏,等.高面板坝三维真非线性地震反应分析方法及模型试验验证[J].水利学报,2003,(9):12-18.ZHAO Jianming,WANG Wenshao,CHANG Yaping,et al.3-D authentic nonlinear dynamic analysis method of high CFRD and verification bymodel test data[J].Journal of Hydraulic Engineering,2003,34(9):12-18.
[5]赵剑明,陈宁,常亚屏,等.龙首二级面板堆石坝地震永久变形分析[J].世界地震工程,2003,19(4):57-62.ZHAO Jianming,CHEN Ning,CHANG Yaping,et al.Study on earthquake-induced permanent deformation of Longtoushi CFRD[J].World Earth-quake Engineering,2003,19(4):57-62.
[6]中国水利水电科学研究院.紫坪铺大坝震后除险加固安全评价和抗震复核Ⅰ[R].北京,2009.China Institute of Water Resources and Hydropower Research.Seismic safety evaluation and recheck of Zipingpu CRFD after Wenchuan Earthquake[R].Beijing,2009.
[2]陈生水,霍家平,章为民.“5.12”汶川地震对紫坪铺混凝土面板堆石坝的影响及原因分析[J].岩土工程学报,2008,30(6):795-801.CHEN Shengshui,HUO Jiaping,ZHANG Weimin.Analysis of effect of“5.12”Wenchuan Earthquake on Zipingpu CFRD[J].Chinese Journal ofGeotechnical Engineering,2008,30(6):795-801.
[3]赵剑明,刘小生,温彦锋,等,紫坪铺大坝汶川地震震害分析及高土石坝抗震减灾研究设想[J].水力发电,2009,35(5):11-14.ZHAO Jianming,LIU Xiaosheng,WEN Yanfeng,et al.Earthquake damages of Zipingpu CFRD in Wenchuan Earthquake and study proposal onseismic fortification of high rock-fill dam[J].Water Power,2009,35(5):11-14.
[4]赵剑明,汪闻韶,常亚屏,等.高面板坝三维真非线性地震反应分析方法及模型试验验证[J].水利学报,2003,(9):12-18.ZHAO Jianming,WANG Wenshao,CHANG Yaping,et al.3-D authentic nonlinear dynamic analysis method of high CFRD and verification bymodel test data[J].Journal of Hydraulic Engineering,2003,34(9):12-18.
[5]赵剑明,陈宁,常亚屏,等.龙首二级面板堆石坝地震永久变形分析[J].世界地震工程,2003,19(4):57-62.ZHAO Jianming,CHEN Ning,CHANG Yaping,et al.Study on earthquake-induced permanent deformation of Longtoushi CFRD[J].World Earth-quake Engineering,2003,19(4):57-62.
[6]中国水利水电科学研究院.紫坪铺大坝震后除险加固安全评价和抗震复核Ⅰ[R].北京,2009.China Institute of Water Resources and Hydropower Research.Seismic safety evaluation and recheck of Zipingpu CRFD after Wenchuan Earthquake[R].Beijing,2009.
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